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No. 770,664. y PATENTED SEPT. zo, 1904.

J. P. SNEDDON. WATER TUBE BUTLER.

APPLICATION FILED 00T.16. 1902. RBNEWED APR.22,1904.

N0 MODEL. 2 SHEETS-SHEET 1.

wn'NEssEs q mvENToR No. 770,664. PATENTED SEPT. 2o, 1904. J. P. SNEDDON.

WATER TUBE BOILER.

APPLIOATION FILED 0OT.16. 1902. RENEWED APB.. 22, 1904.

2 SHEBTS-SHEET 2.

NO MODEL.

WITNESSES INVENTOR @my @MMU MVM tine form to fit the headers 6.

UNITED i STATES Patented September 20, 1904.

PATENT OEETCE.

COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEIV JERSEY.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 770,664, dated September 20, 1904.

Application led October 16,1902. Renewed April 22, 1904. Serial No. 204,424. (No model.)

To all whom, it mln/y concern:

Be it known that I, J AMns P. SNEDDON, of Barberton, Summit county, Ohio, have invented a new and useful Water-Tube Boiler, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this speciiication, in which- Figure 1 is a sectional side elevation showing one form of my improved boiler. Fig. 2 is a front elevation, partly broken away, applicable to either the form of Fig. 1 or Fig. 3; and Fig. 3 is a view similar to Fig. l, showing my preferred form. l

My invention relates to that class of watertube boilers wherein inclined water-tubes are connected to vertically-extending front and rear headers with one or more steam and water drums above.

The object of the invention is to give greater structural strength in boilers of large horsepower, to subdivide the boiler into sections without affecting its integrity as a whole, to provide for easy replacing of the water lintels or sections thereof, and to provide an increased area in the upward steam and water channel, thereby increasing the capacity of the boiler.

In the drawings, 2, 3, and 4 are front headers which are extended downwardly to form water-legs 5, upon which the front portion of the boiler is supported. The intermediate headers 6 at the front may be of the usual serpentine form and extend only to the top of the water-leg 5, where they are connected by nipples 7 with the water-lintels 8. These lintels are in the form of boxes, which extend between the upper ends oi'A the legs 5 and are connected to them by short nipples 9. The header 3 is of serpentine form, while the headers 2 and 4 have their inner faces of serpen- The headers 2, 3, and 4, as well as the header 6, are connected by short tubes l0 with an upper transverse steam and water'drum ll, and this drum is connected by horizontal tubes 12 with the rear headers 13. The front and rear headers are jogged or provided with inclined surfaces 14 on their inner faces in the usual manner to receive the ends of the inclined tubes l5. These tubes may be arranged in any desirable manner, and I have shown the lower tubes 16 at the sides of the fire-box as of rectangular cross-section and larger in diameter than the upper tubes l5, which are arranged in pairs. The rear headers of Figs. 2 and 3 are of greater .depth than the front headers, so that their cross-sectional area or capacity is greater than that of the front headers, and I prefer to use a plurality of rows of tubes, as shown at 12 and 12', for connecting the upper ends of the rear headers to the steam and water drum. I have found by experiment that the capacity of such boilers is increased by increasing the capacity of the up-current channelsgthat is, the channels by which the steam and Water is carried upwardly or toward the steamdrum. In boilers of the type shown the circulation is upwardly and rearwardly through the water-tubes, thence up through the rear headers, and thence forwardly to the steamdrums, and hence by increasing the area of these rear headers and also the connections from them to the steam and water drum I provide a freer channel for the passage of the steam and water, thereby insuring better circulation and increasing the capacity of the boiler. The relation between the areas of the front and rear headers will vary according to the conditions; but to obtain the improved results the up-current headers must be larger than those of the down-current headers.

rIhe advantages of my invention result first from the use of the intermediate water columns or legs which support the intermediate part of the boiler between each firing-door, since this avoids the necessity for a large number of small units where a large capacity is required, supports the intermediate part of the steam and water drum, and makes it easier to replace the sections, and also from the use of the enlarged headers for the up-currents and the plurality of rows of tubes leading from these headers to the steam and water drum, since a freer circulation is afforded and the capacity increased. In Fig. l I show a form similar to that of Fig. 3, in that the intermediate column or water-leg is employed,

the rear headers in this case being shown as similar to the front headers in size and with one row of tubes connecting to the steam and water drum. Similar parts to those of Fig. l are indicated by similar numerals.

The tubes may be inclined in the opposite direction from that shown, the number of the water-columns or supporting-legs may be varied, any desirable baie arrangement may be used, and many other changes may be made in the form and arrangement of the parts without departing' from my invention.

I claim-- 1. A water-tube boiler having vertically-'extending front and rear headers connected by upwardly and rearwardly inclined tubes, a transverse steam and waterdrum located over and connected to the front headers, said headers having supporting-legs at the corners, an intermediate header of the front group having a depending supporting-leg below the firing-opening', and iring-doors between the legs; substantially as described.

2. A water-tube boiler having front and rear headers connected by upwardly and rearwardly inclined tubes, a transverse steam and water drum located over and nippled to the front headers, said headers having supportinglegs at the corners, an intermediate sinuous header'having a depending supporting-leg below the firing-opening, and iiring-doors between the legs; substantially as described.

3. A water-tu be boiler having sinuous front and rear headers connected byinclined tubes, a transverse steam and water drum located over and connected to one of the sets of headers, the headers having supporting-legs at the corners, an intermediate sinuous header having a depending supporting-leg below the iring-opening, and iiring-doors between the legs; substantially as described.

4. A water-tube boiler having front and rear headers connected by rearwardly and upwardly inclined tubes, a transverse steam and water drum located over and nippled to the front headers, said front headers having supporting-legs at the corners, an intermediate sinuous header of the front group having a depending supporting-leg below the iiringopening, water-lintels extending transversely between the upper parts of the legs and connected to the headers, and firing-doors below the lintels and between the legs; substantially as described.

5. A boiler having front and rear headers connected by inclined tubes, an Lipper steam and water drum extending transversely of the tubes and above the down-current headers, the up-current headers being of greater capacity than the down-current headers, and connections of large area. consisting of a plurality of tubes` between said front and rear headers and the transverse steam and water drum; substantially as described.

6. A water-tube boiler having front and rear y headers connected by inclined tubes, anupper transverse steam and water drum extending across one end of the boiler above the tubes, the up-current headers being of greater cubical capacity than the down-current headers, and having horizontally-extending pipes leading'to the steam and water drum from their upper end portions and connections between the drum and the down-current headers; substantially as described.

7. A water-tube boiler having a plurality of vertically-extending sinuous front and rear headers, tubes connecting the headers and inclined upwardly and rearwardly, a steam and water drum extending .transversely over the front header and nippled thereto, the rear headers being of greater depth than the front headers, and two rows of horizontally-extending tubes connecting the upper end of the rear headers to the steam and water drum; substantially as described.

8. A water-tube boiler having front and rear headers connected by inclined tubes, a transverse steam and water drum located over the down-current headers and a connection of large area consisting of a plurality of tubes connecting the upper end of each up-current header to said steam and water drum; substantially as described'.

9. A boiler having front and rear headers connected by tubes inclined upwardly and rearwardly, an upper steam and water drumv extending transversely of the tubes, and above the front down-current headers, the up-current headers being of greater capacity than the down-current headers, and connections of large area consisting of a plurality of horizontal rows of tubes, between the rear upcurrent headers and the transverse steam and water drum, substantially as described.

10. A water-tube boiler having upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the front set of headers having upwardly-extending legs located at the corners of the set and also between the iiring-doors, said legsextending below the grate-level, and a vertical row of tubes connected to the intermediate leg and dividing the furnace into different compartments; substantially as described.

11. A water-tube boiler having upwardly- .extending front and rear headers, inclined water-tubes connecting the front with the rear headers, the front set of headers having supporting-legs located at the corners of the set and between the firing-doors, said legs extending below the lire-grate level, and a vertical row of tubes connected to the intermediate leg and dividing the furnace-space into separate compartments; substantially as described.

12. A water-tube boiler having upwardly- IOO IOS

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ers, both sets of headers having supportingleg's extending down at the corners' and between thefiring-doors, the leg's of the front set extending below the iire-grate level, and a vertical row of inclined tubes connecting the intermediate legs of the front and rear set and dividing' the furnace-space into compartments; substantially as described.

13. A water-tube boiler having' upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the front set of headers having su pporting-legs located at the corners of the set and between the firing-doors, said legs extending below the fire-grate level, a vertical row of inclined tubes connected to the intermediate leg and dividing the furnace-space into separate compartments, and water-lintels of substantially rectangular cross-section connecting the water-legs; substantially as described.

14. A water-tube boiler having upwardlyextending' front and rear headers, inclined water-tubes connecting the front with the rear headers, the up-current headers having legs extending' downwardly at the corne-rs and between the firing-doors to a level below the grate, the intermediate leg having a connection to its header arranged to give a free upiow of fluid without substantial constriction, and a vertical row of tubes connected to said intermediate leg and dividing the furnacespace into compartments; substantially as described.

15. A water-tube boiler having upwardlyextending' front and rear headers, inclined water-tubes connecting the front with the rear headers, said headers having legs extending downwardly at the corners and between the firing-doors to a level below the grate, the intermediate legs having a connection to their headers arranged to give a free upfiow of iiuid without substantial constriction, and a vertical row of tubes connected to said intermediate legs and dividingl thefurnace-space into compartments; substantially as described.

16. A water-tube boiler having upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the up-current headers having legs extending downwardly at the corners and between the firing-doors to a level below the grate and provided with stepped or zigzag inner tubc-receiving"surfaces, the intermediate leg having a connection to its header arranged to give a free upflow of fluid without substantial constriction, and a vertical row of tubes connected to said intermediate leg and dividing the furnace-space into compartments; substantially as described.

17. A water-tube boiler having upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the up-current headers having legs extending downwardly at the corners and between the tiring-doors to a level below the grate and provided with stepped or zigzag inner tube-receiving surfaces, and a vertical row of tubes connected to the intermediate leg' and dividing the furnace-space into compartments; substantially as described.

18. A water-tube boiler having upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the up-current headers having substantially vertical legs extending downwardly at the corners and between the firing-doors to a level below the grate and provided with stepped or zigzag inner tube-receiving surfaces, and a vertical row of tubes connected to the intermediate leg and dividing the furnace-space into compartments; substantially as described.

19. A water-tube boiler having upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the front headers having legs extending downwardly at the corners and between the tiring-doors to a level below the grate, transverse water boxes or lintels having their endsv nippled into the depending legs, the lower ends of the intermediate front headers being connected to said water-boxes, and a vertical row of tu bes connected to the intermediate leg and dividing the furnace into compartments; substantially as described.

20. A water-tube boiler having upwardlyextending front and rear headers, inclined water-tubes connecting the front with the rear headers, the front headers having legs extending downwardly at the corners and between the firing-doors to a level below the grate and having stepped or zigzag tube-receiving surfaces, transverse water boxes or lintels having' their ends nippled into the depending legs, the lower ends of the intermediate headers being connected to said water-boxes, and a vertical row of tubes connected to the intermediate leg and dividing the furnace into compartments; substantially as described.

In testimony whereof I have hereunto set my hand. JAMES P. SNEDDON.

Witnesses:

E. E. BAKER, J. C. FRANK.

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